However, a numerical trend towards better results was observed in tumors with >30% cells stained than tumors with ≤30% staining [ 2 ].
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HER2-Positive Gastric Cancer and Antibody Treatment: State of the Art and Future Developments.
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In the JACOB trial, adding pertuzumab to first-line chemotherapy plus trastuzumab in metastatic HER2-positive esophagogastric cancer failed to significantly improve overall survival in spite of a positive trend in PFS and ORR.